Sub-GHz Josephson parametric amplifiers for the readout of sensors and quantum dots

Visa Vesterinen; Slawomir Simbierowicz; Leila (Robab) Najafi Jabdaraghi; Leif Grönberg; Janne Lehtinen; Mika Prunnila; Joonas Govenius

Sub-GHz Josephson parametric amplifiers for the readout of sensors and quantum dots

Visa Vesterinen, Slawomir Simbierowicz, Leila (Robab) Najafi Jabdaraghi, Leif Grönberg, Janne Lehtinen, Mika Prunnila, Joonas Govenius

Research output: Contribution to conference › Conference Abstract › Scientific › peer-review

Abstract

We present our latest experimental results on sub-GHz Josephson parametric amplifiers (JPAs) fabricated with our Nb/Al-AlOx/Nb junction process [1]. The early generation of our flux-driven reflection-type JPA has found applications in the radio-frequency readout of bolometers [2], as well as quantum dots [3]. We have recently addressed bandwidth limitations by engineering a partially reconfigurable impedance transformer. With a bandwidth of 10 MHz at 20 dB gain at 600 MHz, the improved JPA is in line with the requirements of fast readout schemes for, e.g., semiconductor quantum dots. In addition, we have experimented with a variant where unwanted non-linearities are suppressed by alternating the dipolar orientation of superconducting nonlinear asymmetric inductive elements (SNAILs) in an array.

Original language	English
Publication status	Published - 16 Mar 2021
MoE publication type	Not Eligible
Event	APS March Meeting 2021: Online - Virtual Duration: 15 Mar 2021 → 19 Mar 2021 https://march.aps.org/

Conference

Conference	APS March Meeting 2021
Period	15/03/21 → 19/03/21
Internet address	https://march.aps.org/

Cite this

@conference{ef97f285ed974a0b92fd6908ddbf79f2,

title = "Sub-GHz Josephson parametric amplifiers for the readout of sensors and quantum dots",

abstract = "We present our latest experimental results on sub-GHz Josephson parametric amplifiers (JPAs) fabricated with our Nb/Al-AlOx/Nb junction process [1]. The early generation of our flux-driven reflection-type JPA has found applications in the radio-frequency readout of bolometers [2], as well as quantum dots [3]. We have recently addressed bandwidth limitations by engineering a partially reconfigurable impedance transformer. With a bandwidth of 10 MHz at 20 dB gain at 600 MHz, the improved JPA is in line with the requirements of fast readout schemes for, e.g., semiconductor quantum dots. In addition, we have experimented with a variant where unwanted non-linearities are suppressed by alternating the dipolar orientation of superconducting nonlinear asymmetric inductive elements (SNAILs) in an array.",

author = "Visa Vesterinen and Slawomir Simbierowicz and {Najafi Jabdaraghi}, {Leila (Robab)} and Leif Gr{\"o}nberg and Janne Lehtinen and Mika Prunnila and Joonas Govenius",

year = "2021",

month = mar,

day = "16",

language = "English",

note = "APS March Meeting 2021 : Online ; Conference date: 15-03-2021 Through 19-03-2021",

url = "https://march.aps.org/",

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TY - CONF

T1 - Sub-GHz Josephson parametric amplifiers for the readout of sensors and quantum dots

AU - Vesterinen, Visa

AU - Simbierowicz, Slawomir

AU - Najafi Jabdaraghi, Leila (Robab)

AU - Grönberg, Leif

AU - Lehtinen, Janne

AU - Prunnila, Mika

AU - Govenius, Joonas

PY - 2021/3/16

Y1 - 2021/3/16

N2 - We present our latest experimental results on sub-GHz Josephson parametric amplifiers (JPAs) fabricated with our Nb/Al-AlOx/Nb junction process [1]. The early generation of our flux-driven reflection-type JPA has found applications in the radio-frequency readout of bolometers [2], as well as quantum dots [3]. We have recently addressed bandwidth limitations by engineering a partially reconfigurable impedance transformer. With a bandwidth of 10 MHz at 20 dB gain at 600 MHz, the improved JPA is in line with the requirements of fast readout schemes for, e.g., semiconductor quantum dots. In addition, we have experimented with a variant where unwanted non-linearities are suppressed by alternating the dipolar orientation of superconducting nonlinear asymmetric inductive elements (SNAILs) in an array.

AB - We present our latest experimental results on sub-GHz Josephson parametric amplifiers (JPAs) fabricated with our Nb/Al-AlOx/Nb junction process [1]. The early generation of our flux-driven reflection-type JPA has found applications in the radio-frequency readout of bolometers [2], as well as quantum dots [3]. We have recently addressed bandwidth limitations by engineering a partially reconfigurable impedance transformer. With a bandwidth of 10 MHz at 20 dB gain at 600 MHz, the improved JPA is in line with the requirements of fast readout schemes for, e.g., semiconductor quantum dots. In addition, we have experimented with a variant where unwanted non-linearities are suppressed by alternating the dipolar orientation of superconducting nonlinear asymmetric inductive elements (SNAILs) in an array.

M3 - Conference Abstract

T2 - APS March Meeting 2021

Y2 - 15 March 2021 through 19 March 2021

ER -

Sub-GHz Josephson parametric amplifiers for the readout of sensors and quantum dots

Abstract

Conference

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